题目一:python中String类型和unicode什么关系
整理答案:string是字节串,而unicode是一个统一的字符集,utf-8是它的一种存储实现形式,string可为utf-8编码,也可编码为GBK等各种编码格式
题目二:不用set集合方法,去除列表中的重复元素
方法一:
List=['b','b','d','b','c','a','a'] print "the list is:" , List if List: List.sort() last = List[-1] for i in range(len(List)-2, -1, -1): if last==List[i]: del List[i] else: last=List[i] print "after deleting the repeated element the list is : " , List
方法二:使用列表综合
l1 = ['b','c','d','b','c','a','a'] l2 = [] [l2.append(i) for i in l1 if not i in l2] print l2 题目三:实现斐波那契(Fibonacci)数列 方法一:递归 def fibonacci2(n): if n == 1 or n == 2: return 1 else: return fibonacci2(n-1) + fibonacci2(n-2)
方法二:迭代
def fibonacci(n): if n == 1 or n == 2: return 1 nPre = 1 nLast = 1 nResult = 0 i = 2 while i < n: nResult = nPre + nLast nPre = nLast nLast = nResult i += 1 return nResult print fibonacci(5)